A motorcycle may display a blue light of up to one-inch diameter as part of the motorcycle's rear brake light.
S.D. Codified Laws § 32-20-16
Display of blue light as part of rear brake light authorized
Source: SL 2004, ch 215, § 1.
Official source: South Dakota Legislature. Reproduced from public-domain South Dakota statutes; confirm against the official source for the current text. Not legal advice.